Stored Cross-Site Scripting in Avada Builder Plugin for WordPress
CVE-2026-16654

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Avada (fusion) Builder
Vendor
CVE Published:
28 August 2026

What is CVE-2026-16654?

The Avada (Fusion) Builder plugin for WordPress is susceptible to a Stored Cross-Site Scripting vulnerability. This issue arises from improper input sanitization and output escaping concerning the 'size' shortcode attribute. Authenticated attackers with contributor-level access or higher can exploit this flaw to insert arbitrary web scripts into pages. These scripts will execute when a user views the affected pages. Notably, the WordPress wp_kses_post filter fails to mitigate this risk, as the malicious content exists entirely within a shortcode attribute, which does not contain HTML angle brackets, allowing it to bypass security checks when saved.

Affected Version(s)

Avada (Fusion) Builder 0 <= 3.15.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://avada.com/documentation/avada-changelog/

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

João Pedro Soares de Alcântara
.